Every scene is a challenge. There are technical challenges, but often it's the simplest challenge where you feel a sense of achievement when you pull it off.
Academic achievement was something I'd always sought as a form of reward. Good grades pleased my parents, good grades pleased my teachers; you got them in order to sew up approval.
Achievement builds character.
In terms of achievement, the pride is very important to me. It keeps me going every day. The money is always second to me.